package com.atguigu.gulimall.seckill.scheduled;

import com.atguigu.gulimall.seckill.service.SeckillService;
import lombok.extern.slf4j.Slf4j;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

import java.util.concurrent.TimeUnit;

/**
 * 秒杀商品的定时上架；
 * 		每天晚上3点；上架最近三天需要秒杀的商品
 **/

@Slf4j
@Service
public class SeckillSkuScheduled {

	@Autowired
	SeckillService seckillService;

	@Autowired
	RedissonClient redissonClient;

	private final String upload_lock = "seckill:upload:lock";

	//TODO 幂等性处理
	@Autowired
	@Scheduled(cron = "0 * * * * ?")
	public void uploadSeckillSkuLatest3Days(){
		//1、重复上架无需处理
		log.info("上架秒杀的商品信息...");
		//分布式锁。锁的业务执行完成，状态已经更新完成，释放锁以后，其他人获取到就会拿到最新的状态
		RLock lock = redissonClient.getLock(upload_lock);
		lock.lock(10, TimeUnit.SECONDS);
		try {
			seckillService.uploadSeckillSkuLatest3Days();
		}finally {
			lock.unlock();
		}
	}
}
